Using the STK502 Top Module
2-2
STK502 User Guide
2528A–AVR–11/02
Figure 2-2. Pin1 on ZIF Socket and TQFP Footprint
Caution: Do not mount an ATmega169 on the STK502 at the same time as an AVR is
mounted on the STK500 board. Neither of the devices will work as intended.
2.2
PORT
Connectors
ATmega169 have additional ports to those available on the STK500. The ports are
located on the STK502 board. They have the same pin out and functionality as the ports
on the STK500 board. Port A to Port D are already present on the STK500 board. They
are not duplicated on the STK502.
2.2.1
PORT E/PORT F
Figure 2-3 shows the pin out for the I/O port headers Port E and Port F.
Figure 2-3. General I/O Ports
Note:
Port E is also present on the STK500, but only PE0 to PE2 (three least signifi-
cant bits) are accessible there. To access all Port E bits the connector on the
STK502 must be used.
2.2.2
PORT G/RST
In addition to the normal Port G pins, this connector has the RESET-signal. Se Figure 2-
4.
PE0
PE2
PE4
PE6
GND
PE1
PE3
PE5
PE7
VTG
PORTE
PF0
PF2
PF4
PF6
GND
PF1
PF3
PF5
PF7
VTG
PORTF
1 2
1 2
